Just finished doing the test, followed your method and took pictures this time.

Took these while key in on position with headlight on.

This black/yellow is the bulb, peeled back abit to perform this test.

Before: still have key ON and headlights On.


After: With light on tester lights up and touching black/yellow wire. With headlights on and Key on.


Also, tested the cigerette lighter
Test light off.

Test light on.


Here's my other concern. This Red/Black has been cut.

This same black/red wire is also grounded here.

And notice it runs into the factory radio harness. Not sure, if this means anything thought I post this up also.

Factory harness does have power to two spots.

Here

and here.



Since it was daylight out, I put a towel over the dash to see if the dash lights come while touching the yellow/black wire from the cigerette lighter bulb. It was hard to see but headlights still worked of course.